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Car engines are the heart of any vehicle, converting fuel into mechanical energy to propel the vehicle forward. They come in various types, but the most common is the internal combustion engine, which operates on the principles of combustion and piston movement.

In a typical four-stroke engine, the intake stroke draws in a mixture of air and fuel, which is then compressed during the compression stroke. The spark plug ignites this mixture during the power stroke, causing a controlled explosion that drives the piston down. Finally, the exhaust stroke expels the spent gases.

Car engines can vary in size, configuration, and power output. Common engine configurations include inline-4, V6, and V8, with each having its unique balance of efficiency and performance. Modern engines often feature advanced technologies like turbocharging, direct fuel injection, and variable valve timing to enhance efficiency and power.

Efforts in the automotive industry are continually focused on improving fuel efficiency, reducing emissions, and developing alternative power sources like electric and hybrid systems to address environmental concerns and evolving transportation needs.